Matrix-orbital LK402-25 Bedienungsanleitung PDF herunterladen (Seite 11)

RS422 Module

Figure 7: RS422 Connections

Table 3: Standard Headers

Header

Mate

RS422

16-30 AWG

Wire

Alternate

Power

PCS

Keypad

KPP4x4

GPO

None Offered

Dallas

One-Wire

Temperature

Probe

The LK402-25-422 provides an industrial alternative to the standard RS232 communication protocol.

Rather than single receive and transmit lines, the RS422 model uses a differential pair for each of the

receive and transmit signals to reduce degradation and increase transmission lengths. Power can be

transmitted at distance to a -VPT module or supplied from the immediate vicinity to a regular or -V unit.

RS422 signals are available in a six pin connector as described in the RS422 Connections section.

RS422 Connections

The LK402-25-422 provides a robust RS422 interface to the display line. For this interface, a series of six

wires are usually screwed into the RS422 terminal block provided. An alternate header is also available

to provide local power to a regular or -V unit. To connect to your LK402-25-422, follow the steps below.

1. Set the Protocol Select Jumpers.

RS422: The LK402-25-422 offers only RS422 protocol and does not require any jumper changes.

2. Make the connections.

a. Screw one wire; sized 16 to 30 on the American Wire Gauge, into each of the six terminal block

positions. When local power is supplied, a floppy cable may link to the alternate power header.

b. Connect the Vcc wire to the positive terminal of your power supply and the GND terminal to

the negative or ground lead to provide appropriate power as in Table 42.

c. Secure the A and B wires to your non-inverting and inverting output signals respectively, while

attaching the Z and Y wires to your inverting and non-inverting inputs.

3. Create.

In a PC environment, uProject or hyperterminal will serve to get you started. In addition, a

variety of application notes are also available in a number of different languages to aid in

development. Instructions for the former can be found below and the simple C# example at

www.matrixorbital.ca/appnotes is a great first reference for the latter.

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Matrix-orbital LK402-25 Bedienungsanleitung Seite 11